Forest fires move faster uphill than downhill.
52
Check your map! Virginia extends farther west than West Virginia.
67
If Manhattan had the same population density as Alaska, there would only be 15 people living there.
138
Due to gravitational effects, you weigh slightly less when the moon is directly overhead.
55
Forest growth in the US has exceeded harvest since the 1940’s. Today, we have more trees than any time in the past 100 years.
14
10 of the tributaries flowing into the Amazon river are as big as the Mississippi river.
41
In one day, a full grown redwood tree expels more than 2 tons of water through its leaves.
56